Under Armour Iso-Chill Polo T-Shirt. Iso-Chill fabric helps to dissipate body heat and creates the impression of cold.4-Way Stretch production allows for greater mobility in any direction.The material is a great sweat wicker and it dies very quickly.Anti-Odor technology prevents the formation of microbes that cause an unpleasant odor.Low-profile micro collar.Moulded hem.Under Armour logo on chest and neck.Material: Nylon / Elastan.